Experimental transition probabilities in NII lines S. Mar, C. Pérez, V. R. González, M. A. Gigosos, J.A. del Val, I. de la Rosa and J. A. Aparicio Astron. Astrophys. Suppl. Ser., 144 3 (2000) 509-515 Published online: 15 June 2000 DOI: 10.1051/aas:2000225